Flexible joint for coupling two transmission-shafts.



A G. KREBS. FLEXIBLE JOINT 011 COUPLING TWO TRANSMISSION SHAFTS.

APPLIOATION FILED AUG. 14, 1912.

Patented Aug. 18, 1914.

2 SHEETS-SHEET 1v mmm Law I A. U KREBS. FLEXIBLE JOINT FOR COUPLING TWOTRANSMISSION SHAFTS. APPLICATION FILED AUG.14,1012.

l lfifiglfi Patented Aug. 18, 19111 2 SHEETS" SHEET 2.

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ATTUH/FEVS s resses anrrmn cons'ran'rm Knees, or ran-1s.FRANCEJASSIGNOEMTO sooner-ri eness I DES ancrnns ETAIBLISSEMENTSLPANHAn-n a LE'VASSOR, or rants, remiss.

. t 1 O ring. hav .n

lPa'tente Application filed August 1 1912. t lerial No. 714,973.

17, 31, "Z 315, Specification of Letters Patent.

To all 107mm it may concern: another, although permitting angular n1o-Be it known that l, ARTHUR CONSTANTIN tion. Knees, a citizen of theRepublic of France, A metal ring, l larger in diameter than and aresident of the city of Paris, Republic the disks is arranged in a planeparallel of France, have invented a certain new and 'with the normalplane of the disks, and has improved Flexihle Joint for Coupling Two itsouter surface rounded. TransmissionShafts, of'whieh the followingConnecting the disks are series of lii i a de ri tion, ments f, whichare preferably made fror a. Prior to my invention. when it had beencontinuous piece of flexible material. 1o desired to tr n it power f mone h ft to strip of flexible material is wound 10 1:

another, where the shafts are substantially lows: Starting tangentiallyto one of the in line, but a certain degree of angular modisks, itpasses over the ring E, thence tion of one shaft with respect to theother the surface of and tangentially to the at or must be permitted, aso-called Cardan joint disk, thence over the ring l2 and along 1.5 hasgenerally been used. The most serious surface of and tangentially to thefirst ohjections to the (anion joint. are that no and so on, until itforms a net-worlroi matter what form it takes, it is always sub lyg'onalelements, connecting the two di, jcct to a sliding or rotary frictionwhich and passing over the ring; Ti, and, the aliisorhs power, generatesheat and causes winding operation is continued a sulticien't 2o wear.Also, being subjected generally to length of time, forms a completeoblate considerable centrifugal force, it is very spheroid with holes atthe ends of its shortest di'tlicult to keep this part properlylubridiameter through which the shafts pass, cated, particularly whenused in connection Between the disks are disposed. ttvo with motor cardriving gears in which the. clamping rings (-1- and The ligaments (ardanjoint is exposed to dirt, vdust. and pass Jetween the disks carried bythe shaftmoisture. v and the. clamping rings and are secured h '1. heobject of my invention. is to produce tween the disks and clamping ringsby an improved flexible joint, particularly meansof bolts fl. adapted touse in connection with motor The ligan'ients may heojf any suitable ms:so car dri. ing gears, which joint is designed to terial, such as bandsor cords of a- :tile replace the Gordan joint and to eliminate material,or steel wires or hands, and, when the friction, wear, and necessity forluhricaassembled in the form shown in the drawtion incident thereto.ingrs, maybe glued to each other and cov- The device is illustrated inthe drawings ered'vvith a. suitable elasticc'oating, such asaieompanying the specification, in Figure 1 Illlll'lPl, the surface thusto rmed. presenting of which is shown a front elevation of the a smoothappearance similar to that or? device; in Fig. 2 a side elevation of thedepneumatic tires for motor car Wheels, nd, vice partly in section; andin Fig. 3 a diait the covering is suitably chosen, may be grammatic viewshowing the operation of ater-proof 40 the device in connection with twoshafts at The operation of my improved device is as an angle. to oneanother. 7 follows: The driving; shaft in rotating, leterring to Fig. 2.A indicates one of. will transmit a, torsional effort to the driven theshafts, tohecoupled, say, the driving shaft B by pulling upon theligaments lo- Shaft. and B indicates the other shaft, say ratedtangentially to the driving shaft and the driven shaft. Each of theseshafts ter-- in a line with the effort transmitted, Fo minates in a diskslightly larger in diameter instance, (referring'to Fig. 1) if thesystem than thes-hatts and disposed in a plane at is assumed to herotating in a clockwise diixigrht angles to the axis of the shaft.I'OtilOil. the etlort will be transmitted along:

At the end of shaft A' is formed a socket the ligaments extending" in acounter-clock- 5o l) in which fits a hall 0 carried by shaft wisedirection tangentially to the disk. This ar'ai'iaement insures a meetingof the lVhen the two shafts are in alinement, no axes of shafts A and Bat a definite point deformation of the system takes place em andprevents lateral and longitudinal inocept that due to the elasticity ofthe tion of the shafts with respect to one terial used in the ligaments,Ir, however,

Mill

the two shafts form en angle/with. each other, as in Fig. 3, the sphioifi will be slightly deformed, as shown in the figure,

' without-requiring any percbptible elongw tion of the igaments.

While I have only shown and described oneform of my invention, it isobvious that it may be varied within wide hmits as to the nature of thematerial, proportion of the ports and general arrangement thereof,Without departing from the spirit of'my invention, Y

What I claim and desire secure by Let-.

ters Patent is? r 1. In it device of the kind described, a. drivingdisk, a driven (118k, a ring member of larger diameter than the disksand a pinrality of ii uments passing over said ring member andconnecting sai disks.

,2. In a device 'ofthe kind described a. driving disk, a driven disk, :1ring mem r of larger diameter than the disks and arranged in a planeparallel to the normal pla nes of the disks,and a plurality of ligamentsassin'gzover said ring member and connecting said disks. ,3. In itdevice of the kind described, a

driving dislg-e driven disk, 11 ring member them. 85

oflerger diameter thanthe disks arranged in a plane parallel to thenormal planes of the disks, and a plurality of ligaments passingovcrwsaidflring member connectin the said disks and arranged"tangentialfy to 4. In a. device of the kind described, a

member and arranged 'tangentia ing over the ring {mem driving disk, adriven disk, :1 ring member,

6. In a device of the kind described, a driving shaft, 'aJdriYQHMSbA Pand connecting means for the shafts disfidsed between disks and at themand comprising a continuous band of flexible material wound to formnnoblate spheroid. r

7. In a device of the kind described, a driving disk,\n driven disk, aring member y to said of larger diameter than the disks, and acontinuous band of flexible material wound between the disksv and overthe ring member to .form an oblate spheroid.

In testimony whereof I have signed this specification in the presence oftwo subscribing witne'ss'es ARTHUR .CONSTANTIN KREBS.

Witnessesz;

' EMILE Lmmn'r,

H. C. Coxn,

